A　fabrication　process　that　combines　an　ultrathin　alumina　membrane　(UTAM)　surface　nanopatterning　technique　and　a　physical　vapor　deposition　method　has　been　designed　for　realizing　well-defined　Au　nanoparticle　arrays　for　sensitive,　uniform,　and　stable　surface-enhanced　Raman　scattering　(SERS)-active　substrates.　High　Raman　signals　are　obtained　by　adjusting　the　structural　parameters　of　the　metallic　nanoparticles　when　rhodamine　6G　(R6G)　and　4-mercaptopyridine　(4-MP)　are　used　as　the　probe　molecules.　The　corresponding　estimated　enhancement　factors　(EFs)　are　6.5x10(6)　(R6G)　and　6.8x10(5)　(4-MP),　respectively.　The　simulated　distributions　of　the　electric　field　of　SERS　substrates　coincide　with　the　experimental　results.　Raman　measurements　at　randomly　selected　spots　on　a　substrate　show　a　standard　EF　deviation　of　about　5%,　which　indicates　a　desirable　SERS　uniformity.　An　advantageous　feature　of　our　SERS　substrate　is　its　long-term　stability　of　enhanced　Raman　signals.　Raman　measurements　on　a　substrate　after　one　year　show　almost　the　same　magnitude　of　Raman　signal　(10(6)　for　R6G　and　10(5)　for　4-MP)　as　that　of　the　original　measurement.　Such　substrates　with　good　SERS　sensitivity,　uniformity,　and　stability　should　have　high　potential　for　SERS-related　applications.